App Designer UIAxes Mouse Click Registration

I want to display a .jpg image in the UIAxes of the App Designer and then be able to click on certain pixels and save the coordinates to select a region on the image.

I know that this feature was missing in early 2018 but I couldn't find anything else on the topic.

Can anyone tell me, if it's possible to do and how?

Thanks.

Answer 1

[Sahithi Kanumarlapudi]

You can use ‘getpts’ to get the coordinates of the selected points but it is not recommended.

In order to select a region from an image you can use on of the techniques present in “Region Of Interest”

The techniques can be found at the below link

https://www.mathworks.com/help/images/roi-creation-overview.html

For more information in getpts refer to

https://www.mathworks.com/help/images/ref/getpts.html

Hope this helps!

Answer 2

[Hope Q]

App Designer supports Window button up, down and motion functions. See the "Window Functions" section here:

https://www.mathworks.com/help/matlab/ref/matlab.ui.figureappd-properties.html?searchHighlight=windowbuttondownfcn%20callback%20app%20designer&s_tid=doc_srchtitle

This post shows how to get the coordinates in the axes coordinate space

https://www.mathworks.com/matlabcentral/answers/458264-using-windowbuttondownfcn-in-app-designer